NAVIGATION SYSTEM, NAVIGATION SYSTEM CONTROL METHOD AND PROGRAM

摘要

[TASK] To provide a technique for improving the accuracy of specifying the current location. [MEANS FOR SOLVING THE PROBLEM] A first signal and a second signal that is different from the first signal are received. A region in which the current location is present is estimated on the basis of a combination of the status of reception of the first signal and the status of reception of the second signal.